Made a Saturn 2 Vat Holder that is mounted to 2020 tslot extruded aluminum (pictured is 50mm, but 40mm is likely tall enough for most cases). Also included a funnel holder and base to mount to another surface. Since this is uses 2020 tslot, you can search for other solutions for funnel and base as well!
You will need 1 m5 bolt and nut for each piece that slides on the extrusion. Plan ahead and do some searches for m5 bolt knobs to make them easier to hand tighten as well :)
Modeled with onshape, edit it here.
(rev share links below)
Used this 500mm (50cm) aluminum extrusion here: https://amzn.to/3G82qb6
If this has been helpful to you please consider supporting my effort using the donation button at the top:

I have also created this sticker set perfect for your ultrasonic cleaner:
https://shop.kactuskrunch.com/product/ultrasonic-cleaner-10-sticker-sheet

The author hasn't provided the model origin yet.